Unit 2 Signature Experience

Multiple Choice

Hydrogen is a

• element

• compound

• mixture

Multiple Choice

Oxygen is a

• element

• compound

• mixture

Multiple Choice

Water (H2O) is an

• element

• compound

• mixture

Fill in the Blanks

Fill in the Blanks

Multiple Choice

Which side of the chemical equation represents the reactants?

• Left side

• Right side

• Above the arrow

• Below the arrow

Multiple Choice

Which side of the chemical equation represents the products?

• Left side

• Right side

• Above the arrow

• Below the arrow

Multiple Choice

What does the arrow mean?

• equals

• makes

• yields

• creates

Multiple Choice

Is the chemical equation for water (H2 + O → H2O) balanced or unbalanced?

• Balanced

• Unbalanced

• Cannot be determined

• Only hydrogen is balanced

Multiple Choice

When water is formed from hydrogen and oxygen, is this a physical or chemical change?

• Physical change

• Chemical change

Multiple Choice

When water is changed from a liquid to a solid by freezing, is this a physical or chemical change?

• Physical change

• Chemical change

Multiple Choice

The ocean an example of a

• element

• compound

• mixture

Multiple Choice

When we mix salt (NaCl) with water (H2O) is this a physical or chemical change?

• Physical

• Chemical

Open Ended

What is one new thing you learned about the composition of water today, and do you have any questions about how water molecules are formed?

Open Ended

What do you think happens when we add other chemicals into our water like industrial waste, fertilizer, and pesticides?